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TRF No.:IECEN60950_1B
TRF originator: SGS Fimko
Linear Filter LF1 winding
70.7
84.7
130
PCB under Q1
93.5
89.5
130
PCB under D9
86.4
88.5
130
Electrolytic Capacitor C2
71.9
84.1
105
Opto-coupler U1
80.9
78.1
100
Primary lead wire
61.0
64.7
80
Output cord
62.0
62.9
80
Enclosure (inside)
62.8
64.7
--
Enclosure (outside)
49.6
50.3
95
Ambient
40.0
40.0
--
Temperature rise ∆T of winding:
R
1
(Ω)
R
2
(Ω)
T
(°C)
Allowed
T
max
(°C)
insulation
class
--
--
--
--
--
--
--
--
--
--
--
--
Note(s):
The temperatures were measured under worst case normal mode defined in 1.2.2.1 and as described in sub-
clause 1.6.2 and at voltages as described above.
With a rated maximum ambient temperature of 40 °C, the maximum temperature rises are calculated as
follows:
Winding components providing safety isolation:
- Class B
follows:
Winding components providing safety isolation:
- Class B
→ Tmax = 120°C-10°C = 110°C (10°C decreased by thermocouple method)
Components with maximum absolute temperature of:
- Opto-coupler 100 °C
- Electrolytic Capacitor 105 °C
- PCB 130 °C
- LF1 winding 130 °C
- Output cord 80°C
- Primary lead wire 80°C
Operator touchable surface with maximum temperature rise of:
- 95°C
- Output cord 80°C
- Primary lead wire 80°C
Operator touchable surface with maximum temperature rise of:
- 95°C
4.5.2
TABLE: ball pressure test of thermoplastic parts
P
allowed impression diameter (mm) ................. : ≤ 2 mm
Part
Test temperature
(°C)
Impression diameter
(mm)
Pin sleeving material for BS plug (SE1X)
125
1.7
Plug holder material for Euro-plug
125
1.3
Pin sleeving material of Australian plug
125
1.6
PCB
125
1.0
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